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(First upload on February 10 2009. Last on August 15 2021) [ 日本語 | English ]

Robinia L. (ハリエンジュ) Harienju (ハリエンジュ, 針槐), black locust Nise-akashia (ニセアカシア/アカシア/イヌアカシア) Lifeform: deciduous tall tree Distribution: native to the North America (exotic to Japan, introduced in 1873) Biologically invasive species in Japan Habitat: various (often use for slope protection), as a pioneer

HUSTEP: Plants and Plant communities in Japan (flora list) Nitrogen-fixing plant Use: outdoor construction, heavy-duty applications, ground contact-applications, high-strength wood products and firewood, because of hard,dense, rot-resistant anddurable wood f. inermis (Mirb.) Rehd. (トゲナシニセアカシア), no spines

Robinia pseudoacacia in Hokkaido

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1 2 3
4 5 6
[1] in the campus of Hokkaido University on July 14 2007. [2/3] a street tree at N24/W2, North Ward, Sapporo, on July 3 2010 (bark). [4] near a fumarole in the Nishiyama Craters on Mount Usu on May 26 2021. [5] nearby a tennis court in the Hokkaido University campus on November 12 2019. [6] seedlings and sproutings in a open land in N27/E3, East Ward, Sapporo, on August 3 2021.

Morphology

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Shoot A shoot with an inflorescencde skected on June 15 1983.

Flower Flower structrue: Papilionaceous corolla, and diadelphous stamens (9 + 1) Petals Floral diagram